We used Daytrip from Seville to Lagos, and Lagos to Lisbon. Both drivers were great. Punctual, knowledgeable, friendly, and the vehicles were big, clean and comfortable. They even had WiFi.
Door to door service on your schedule is so much easier than renting a car, or taking a train. No taxis needed (which is a challenge with 5 people), connecting trains, worry about getting lost or missing a train, parking, etc.
We did not schedule any side trips, but still learned a great deal from our drivers. And we saved 4 hours per trip avoiding taxi/bus/train options available to us.
Will definitely use again.